My best work is often almost unconscious and occurs ahead of my ability to understand it.

I have this awareness that the more dynamic the situation is, the more on guard I need to be that the dynamic isn't controlling the situation. I found that myself in the Galapagos. For the first time in my life I was around very exotic animals, colorful, beautiful, and immediately present, all around. Birds, turtles, iguanas, seals. I was being seduced by their exoticism, I was taking pictures.The pictures weren't well lit, there was no moment in play, there was no depth to the pictures. I was just gawking with my camera at something I'd never seen before.

Life rarely presents fully finished photographs. An image evolves, often from a single strand of visual interest - a distant horizon, a moment of light, a held expression.

I'm interested in smokers standing on ledges, and big box stores, the rise of the suburbs, and the hollowing out of small towns. Self-storage. Things that didn't exist 50 years ago. Our common culture. What we have agreed is OK to live with.

I can't speak for other photographers, but the photographers who went forward strongly when the so-called "official" part of their career ended, to me, were those who had taught. Teaching enriches and enlivens one's work.

Teaching has never been far from my life. It's the most natural thing I do. Apparently, as I said, I cannot not do it.

Above all, it's hard learning to live with vivid mental images of scenes I cared for and failed to photograph. It is the edgy existence within me of these unmade images that is the only assurance that the best photographs are yet to be made.